Mantle for cone crushers



oct. 27, 1970 Filed sept, 20. 1967 H. W. ADAM ETAL MANTLE FOR GONECRUSHERS 2 Sheets-Sheet l I l l wrm/raw. www 14,/ 4m

Oct. 27; 1970 Y H, w, ADAM E TAL 3,536,268

I MANTLE FOR GONE CRUSHERS l Filed Sept. 20, 1967v 2 Sheets-Sheet 2 j f5l 51.4. 54

United States Patent O 3,536,268 MANTLE FOR GONE CRUSHERS Howard W.Adam, Hales Corners, and Jerome C. Motz and Rudolph il. Gaspar-ac,Milwaukee, Wis., assignors to Nordberg Manufacturing Company, Milwaukee,Wis., a corporation of Wisconsin Filed Sept. 20, 1967, Ser. No. 669,215Int. Cl. B02c 2/00 U.S. Cl. 241-293 16 Claims ABSTRACT OF THE DISCLOSUREA wearing part for use in a cone Crusher and including a cast crushingmember having a conical supporting surface, an outer circumferentialsurface, and a conical crushing surface; the crushing member is madefrom a hard, wear resistant metal. An annular retaining band is securedaround the conical crushing member to prevent the conical member frombreaking up during use in the cone Crusher. The cast crushing member mayhave a plurality of reinforcing rings imbedded or in cavities therein.

SUMMARY OF THE INVENTION This invention relates to cone Crushers andmore particularly to wearing parts such as a mantle or bowl liner forsuch a Crusher.

A primary object of this invention is to provide a wearing part for acone crusher which has a hard, wear resistant crushing surface and meansfor retaining any fractured segments of the material forming thecrushing surface in operative position should such material fracture orcrack during use in the cone Crusher.

Another object of this invention is a Wearing part, such as a mantle orbowl liner, for use in a cone crusher which has a keeper or retainingring suitably secured around a hard, wear resistant crushing member.

Another object is to provide a Wearing part for 'use in a cone Crusherwhich includes a crushing member having a generally conical crushingsurface and an outer circumferential surface with a retaining ringsecured to the outer circumferential surface to maintain the conicalcrushing surface as a conical surface should the crushing member 'becomesectionalized as a result of cracking.

Another object is to provide an economical, long Wearing mantle or bowlliner for use in a cone Crusher.

A further object is to provide a mantle or bowl liner structure whiche'nables the use of a hard, Wear resistant material for the activecrushing portion thereof.

Other objects and advantages of the invention will become apparent uponreading the following description of the invention.

BRIEF DESCRIPTION OF THE DRAWINGS The invention is illustrated more orless diagrammatically in the accompanying drawings wherein:

FIG. 1 is a plan View of a mantle structure showing one embodiment ofthis invention;

FIG. 2 is a cross-sectional view taken along line 2-2 of FIG. 1 to anenlarged scale;

FIG. 3 is a cross-sectional view like FIG. 2 of a modified form of theembodiment of FIG. 1; and

FIG. 4 is a partial cross-sectional view of a bowl liner structureshowing another embodiment of this invention.

DESCRIPTION OF THE PREFERRED EMBODIMENT Like reference numerals Will beused to refer to like parts throughout the following description of thedrawings.

Referring now to FIG. l, a mantle has been shown as comprising atruncated conical crushing member 12 and an annular retaining band orring 14.

V3,536,268 Patented Oct. 27, 1970 lCC The truncated conical crushingmember 12 is formed with an outer conical crushing surface 16, an innerconical supporting surface 18, an inner circumferential surface 20 andan outer circumferential surface 22. It should be understood, however,that this invention is not limited to the particular mantle crushingmember configuration shown in FIGS. 2 and 3. For example, the angles ofinclination of the conical crushing surface 16 and the conicalsupporting surface 18 may be widely varied; and, as will be understoodby those skilled in the art, the shape of the inner circumferentialsurface 20l may be Widely varied depending upon the means by whichv themantle 1i) is to be mounted.

Referring now to FIG. 4, a bowl liner has been shown as comprising acrushing member 28 and an annular retaining band or ring 30. Thecrushing member 28 has been shown `formed with a generally conicalportion 32 and an upwardly extending generally cylindrical portion 34.The cylindrical portion 34 includes an outwardly extending guide ange 36and an upper flange 38. The conical portion 32 includes an inner conicalcrushing surface 40, an outer conical backing or supporting surface 42and an outer circumferential surface 44. It should be understood,however, that this invention is not limited to the particular linercrushing member configuration shown in FIG. 4. For example, as will beunderstood by those skilled in the art, the means by which the liner ismounted to the Crusher bowl, in this instance the cylindrical portion 34of the crushing member 28, may be widely varied; also, the angle ofinclination of the conical supporting surface 42 and conical crushingsurface 40 may be widely varied.

The retaining bands or rings 14 and 30' may be shrunk fit around orotherwise suitably secured to the outer circumferential Surfaces 22 and44 respectively of the mantle crushing member 12 and liner crushingmember 28. For example, it has been found that on a mantle which has acircumferential surface 22 having a diameter of about 35.75 inches, aroom temperature diametral interference in the range of .015 to .030inch between the retaining band 14 and the surface 22 will suitablysecure the band 14 to the crushing member 12 When the former is shrunkfit therearound. It should be understood, however, that the retainingbands may be effectively secured to the crushing members by means otherthan shrink tting. For example, a suitable adhesive might be used; or,the bands 14 and 30 might be formed with a turnbuckle or other suitablemeans for drawing the band tightly around the crushing member.

Although the retaining bands or rings 14 and 30 have been shown as beinggenerally rectangular in cross section, it should be understood thatsuch cross-sectional shapes may take a variety of forms. What isimportant iS that the retaining bands be adapted to exert a generallyradially inwardly directed compressive force around the periphery of thecrushing member so that should the crushing member crack during use, thesegments of the crushing member formed by such cracks will be retainedin an operative position by the retaining band.

The mantle crushing member 12 and liner crushing member 28 arepreferably castings and may have reinforcing rings 24 imbedded thereinwhich are spaced from each other by spacers 26 and spaced relative tosurface 18 by back spacers 27. For details concerning the rings 24 andspacers 26 and 27, reference is made to copending application Ser. No.586,413, liled Oct. 13, 1966 now Pat. No. 3,473,746, issued Oct. 21,1969.

The mantle crushing member 12 and liner crushing member 28 are madeusing a hard, wear resistant Inaterial such as perlitic, carbidic, whitecast iron; martensitic, carbidic, chrome-nickel alloyed cast iron,sometimes known as Nihard; and like materials having a Brinell hardnessnumber at least as high as 400.

The bands 14 and 30 may be made of any suitable metal, but it Will beunderstood that the band should have a tensile strength suliicientlyhigh to resist fracture. For example, the range of ultimate tensilestrengths may be as low as 45,000 or less, and as high as 100,000 ormore.

The use, operation, and function of this invention are as follows:

Generally, the bowl liner is positioned within a bowl with the linersurface 42 engaging a generally complementary surface formed in thebowl. In the particular configuration shown, the liner may be secured tothe bowl by suitable means such as wedge elements which engage the upperange 38. It should be understood, however, that the liner crushingmember 28 may be provided with other suitable mounting means. The bowland liner surround a head adapted for gyratory motion. The mantle ismounted on the head and may be suitably retained by a member whichengages a portion of the inner circumferential Surface and forces theinner conical supporting surface 18 into supporting engagement with acomplementary supporting surface on the head. The inner conical crushingsurface 40 of the liner and the outer conical crushing surface 16 of themantle 10 define a crushing cavity into which material is dischargedfrom above for reduction. During such use, the bowl liner and mantle aresubjected to extreme stresses which tend to deform and/or cause the bowlliner and mantle to fracture while the crushing surfaces 16 and 4t) aresubjected to extreme abrasive forces.

Because of the extreme stresses applied to the wearing parts of a coneCrusher during crushing, the choice of materials from which these partsare made has been limited, in accepted practice, to metals which haverelatively poor Wear characteristics, but which have a toughness whichenables them to stand the crushing stresses without breaking orcracking. Manganese steel has been a generally accepted and widely usedmaterial for bowl liners and mantles. However, although manganese steelis tough and resistant to breaking or cracking, the crushing surfaces 16and 40` lmay wear away rapidly when crushing an abrasive material. Forexample, in some crushing operations, a manganese steel mantle will wearaway at a rate of approximately 1A; of an inch per three hour period.

Because of the great wear to which surfaces 16 and 40 respectively ofthe mantle and bowl liner are subjected, it is extremely desirable touse hard, wear resistant cast materials such as perlitic, carbidic,White cast iron; marf tensitic, carbidic, chrome-nickel alloyed castiron, sometimes known as Nihard; and the like which have a Brinellhardness number at least as high as 400. Such materials however, tend tofracture or crack when subjected to stresses in the order of magnitudeexperienced by a mantle or bowl liner within a cone Crusher.

In the cone Crusher Wearing part structure of this invention, an annularmetal retaining band or ring is suitably compressively secured, forexample by a shrink tit, to the outer circumferential surface of thecast crushing member so that during use in the cone Crusher, should thecast crushing member fracture, the fractured segments are retained inworking position by the metal retaining band. Accordingly, the coneCrusher wearing part structure of this invention enables the use ofhard, wear resistant metals for the active crushing portion of thewearing part.

Such fractured segments of the liner or mantle crushing member may befurther maintained in working position by rings 24 imbedded or incavities within the cast crushing member as disclosed in applicationSer. No. 586,413, filed Oct. 13, 1966 now Pat. No. 3,473,746. However,these rings may be omitted.

Although the metals described herein are particularly adapted for use inthis invention, it should be understood l that the cone Crusher wearingpart crushing member may be made from a variety of hard, wear resistantmaterials.

Further, although several embodiments and modifications thereof havebeen depicted and described, such are intended to be exemplary only, andnot definitive. lt should also be understood that many alterations andvariations may 'be made without departing from the inventionsfundamental theme. Accordingly, the scope of the invention should belimited only by the scope of the following appended claims.

What is claimed is:

1. For use in a cone Crusher of the type including an annular crushingliner and a head adapted to gyrate relative to said liner and locatedinwardly of said liner, the improvement comprising a mantle carried bysaid head for gyratory motion therewith and adapted to crush material incooperation with said liner, said mantle including, in combination, acrushing member having an inner conical surface for engagement with saidgyrating head, an outer conical surface for crushing said material, andan outer circumferential surface, and means for exerting a generallyradially inwardly directed compressive force around the periphery ofsaid crushing member to thereby retain fractured segments of saidcrushing member in operative crushing position.

2. The structure of claim 1 further characterized in that said crushingmember has a generally truncated conical cross-sectional shape and is ahard wear resistant metal having a Brinell hardness number not less than400.

3. The structure of claim 2 further characterized in that said crushingmember is formed with reinforcing members therewithin.

4. The structure of claim 1 further characterized in that said means forexerting a force includes a retaining ring secured to said outercircumferential surface of said crushing member.

5. The structure of claim 4 further characterized in that said retainingring is secured to said outer circumferential surface of said crushingmember by shrink fitting it therearound.

6. For use in a Crusher of the type having a bowl and a head adapted togyrate relative to the bowl and located inwardly thereof, theimprovement comprising a crushing member having a conical surface forcrushing material, a second conical surface for engagement with saidcrusher, and an outer circumferential surface, said crushing memberbeing of a hard, Wear resistant material, and means for exerting agenerally radially inwardly directed force around the periphery of saidcrushing member to thereby retain fractured segments of said crushingmember in operative crushing position.

7. The structure of claim 6 further characterized in that said crushingmember is a hard wear resistant metal having a Brinell hardness numbernot less than 400.

S. The structure of claim 6 further characterized in that said crushingmember is formed with reinforcing members therewithin.

9. The structure of claim 6 further characterized in that said-forceexerting means includes a retaining ring scured to said outercircumferential surface of said crushing member.

10. The structure of claim 9 further characterized in that saidretaining ring is secured to said outer circumferential surface of saidcrushing member by shrink fitting it therearound.

11. A wearing part for use in Crushers and the like, including acrushing member having a generally flat, somewhat frusto-conicalcrushing surface, a supporting surface, and a generally cylindricalouter surface, the crushing member being of a hard wear-resistantmaterial, and a retaining ring on the outer cylindrical surface applyinga radial stress inwardly to the crushing member.

12. The structure of claim 11 further characterized in that the crushingmember is generally frusto-conical.

13. The structure of claim 11 further characterized in that theretaining ring is applied to the crushing member by a shrink fit.

14. The structure of claim 11 further characterized in that the crushingmember is formed of a material having a Brinell hardness number at leastas high as 400.

15. A wearing part for use in cone crushers and the like, including agenerally at somewhat frusto-conical crushing member having a crushingsurface adapted to be disposed and operative in the crushing cavity ofthe Crusher, a supporting surface on the crushing member adapted to besupported on and bear against a part of the cone Crusher, and an outerperipheral surface on the crushing member, the crushing member being ofa hard Wear-resistant material having a Brinell hardness number on theorder of 400 or greater, a retaining ring on the outer peripheralsurface of the crushing member, and a compression fit between theretaining ring and the cylindrical surface of the crushing member sothat the ring applies radial inward stresses to the crushing member.

16. A Wearing part for use in cone crushers including, in combination, acrushing member having a general conical crushing surface and an outercircumferential surface, said crushing member being a hardwear-resistant material, and means for retaining fractured segments ofsaid crushing member in operative crushing position, said retainingmeans comprising an annular retaining band secured to said outercircumferential surface of said crushing member, said annular retainingband being secured t0 said outer circumferential surface of saidcrushing member by shrink fitting it therearound.

References Cited UNITED STATES PATENTS 1,494,265 5/1924 Martindale241-299 1,774,556 9/1930 Jones 241--299X 2,120,697 6/1938 Finnegan241-293 X 2,467,938 4/1949 Kennedy 241-299 FRANK T. YOST, PrimaryExaminer U.S. Cl. X.R.

